4 * Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
5 * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation version 2 of the License.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include "libsysfs/sysfs/libsysfs.h"
34 #include "udev_libc_wrapper.h"
36 #include "udev_utils.h"
40 static int devpath_to_db_path(const char *devpath, char *filename, size_t len)
44 /* add location of db files */
45 strlcpy(filename, udev_root, len);
46 strlcat(filename, "/", len);
47 start = strlcat(filename, DB_DIR, len);
48 end = strlcat(filename, devpath, len);
52 /* replace '/' to transform path into a filename */
53 for (i = start+1; i < end; i++)
54 if (filename[i] == '/')
55 filename[i] = PATH_TO_NAME_CHAR;
60 static int db_file_to_devpath(const char *filename, char *devpath, size_t len)
64 strlcpy(devpath, "/", len);
65 end = strlcat(devpath, filename, len);
67 /* replace PATH_TO_NAME_CHAR to transform name into devpath */
68 for (i = 1; i < end; i++)
69 if (devpath[i] == PATH_TO_NAME_CHAR)
75 int udev_db_add_device(struct udevice *udev)
77 char filename[PATH_SIZE];
78 struct name_entry *name_loop;
84 /* don't write anything if udev created only the node with the
85 * kernel name without any interesting data to remember
87 if (strcmp(udev->name, udev->kernel_name) == 0 &&
88 list_empty(&udev->symlink_list) && list_empty(&udev->env_list) &&
89 !udev->partitions && !udev->ignore_remove) {
90 dbg("nothing interesting to store in udevdb, skip");
94 devpath_to_db_path(udev->devpath, filename, sizeof(filename));
95 create_path(filename);
96 f = fopen(filename, "w");
98 err("unable to create db file '%s': %s", filename, strerror(errno));
101 dbg("storing data for device '%s' in '%s'", udev->devpath, filename);
103 fprintf(f, "N:%s\n", udev->name);
104 list_for_each_entry(name_loop, &udev->symlink_list, node)
105 fprintf(f, "S:%s\n", name_loop->name);
106 fprintf(f, "M:%u:%u\n", major(udev->devt), minor(udev->devt));
107 if (udev->partitions)
108 fprintf(f, "A:%u\n", udev->partitions);
109 if (udev->ignore_remove)
110 fprintf(f, "R:%u\n", udev->ignore_remove);
111 list_for_each_entry(name_loop, &udev->env_list, node)
112 fprintf(f, "E:%s\n", name_loop->name);
119 int udev_db_get_device(struct udevice *udev, const char *devpath)
121 char filename[PATH_SIZE];
122 char line[PATH_SIZE];
123 unsigned int major, minor;
130 devpath_to_db_path(devpath, filename, sizeof(filename));
131 if (file_map(filename, &buf, &bufsize) != 0) {
132 info("no db file to read %s: %s", filename, strerror(errno));
136 strlcpy(udev->devpath, devpath, sizeof(udev->devpath));
138 while (cur < bufsize) {
139 count = buf_get_line(buf, bufsize, cur);
145 if (count > sizeof(udev->name))
146 count = sizeof(udev->name);
147 memcpy(udev->name, &bufline[2], count-2);
148 udev->name[count-2] = '\0';
151 if (count > sizeof(line))
152 count = sizeof(line);
153 memcpy(line, &bufline[2], count-2);
154 line[count-2] = '\0';
155 sscanf(line, "%u:%u", &major, &minor);
156 udev->devt = makedev(major, minor);
159 if (count > sizeof(line))
160 count = sizeof(line);
161 memcpy(line, &bufline[2], count-2);
162 line[count-2] = '\0';
163 name_list_add(&udev->symlink_list, line, 0);
166 if (count > sizeof(line))
167 count = sizeof(line);
168 memcpy(line, &bufline[2], count-2);
169 line[count-2] = '\0';
170 udev->partitions = atoi(line);
173 if (count > sizeof(line))
174 count = sizeof(line);
175 memcpy(line, &bufline[2], count-2);
176 line[count-2] = '\0';
177 udev->ignore_remove = atoi(line);
180 if (count > sizeof(line))
181 count = sizeof(line);
182 memcpy(line, &bufline[2], count-2);
183 line[count-2] = '\0';
184 name_list_add(&udev->env_list, line, 0);
188 file_unmap(buf, bufsize);
190 if (udev->name[0] == '\0')
196 int udev_db_delete_device(struct udevice *udev)
198 char filename[PATH_SIZE];
200 devpath_to_db_path(udev->devpath, filename, sizeof(filename));
206 int udev_db_lookup_name(const char *name, char *devpath, size_t len)
208 char dbpath[PATH_MAX];
212 strlcpy(dbpath, udev_root, sizeof(dbpath));
213 strlcat(dbpath, "/", sizeof(dbpath));
214 strlcat(dbpath, DB_DIR, sizeof(dbpath));
215 dir = opendir(dbpath);
217 err("unable to open udev_db '%s': %s", dbpath, strerror(errno));
223 char filename[PATH_SIZE];
224 char nodename[PATH_SIZE];
232 if (ent == NULL || ent->d_name[0] == '\0')
234 if (ent->d_name[0] == '.')
237 snprintf(filename, sizeof(filename), "%s/%s", dbpath, ent->d_name);
238 filename[sizeof(filename)-1] = '\0';
239 dbg("looking at '%s'", filename);
241 if (file_map(filename, &buf, &bufsize) != 0) {
242 err("unable to read db file '%s': %s", filename, strerror(errno));
247 while (cur < bufsize && !found) {
248 count = buf_get_line(buf, bufsize, cur);
255 if (count > sizeof(nodename))
256 count = sizeof(nodename);
257 memcpy(nodename, &bufline[2], count-2);
258 nodename[count-2] = '\0';
259 dbg("compare '%s' '%s'", nodename, name);
260 if (strcmp(nodename, name) == 0) {
261 db_file_to_devpath(ent->d_name, devpath, len);
269 file_unmap(buf, bufsize);
279 int udev_db_get_all_entries(struct list_head *name_list)
281 char dbpath[PATH_MAX];
284 strlcpy(dbpath, udev_root, sizeof(dbpath));
285 strlcat(dbpath, "/", sizeof(dbpath));
286 strlcat(dbpath, DB_DIR, sizeof(dbpath));
287 dir = opendir(dbpath);
289 err("unable to open udev_db '%s': %s", dbpath, strerror(errno));
295 char filename[PATH_SIZE] = "/";
299 if (ent == NULL || ent->d_name[0] == '\0')
301 if (ent->d_name[0] == '.')
304 end = strlcat(filename, ent->d_name, sizeof(filename));
305 for (i = 1; i < end; i++)
306 if (filename[i] == PATH_TO_NAME_CHAR)
308 name_list_add(name_list, filename, 1);
309 dbg("added '%s'", filename);